塑料排水板联合超载预压处理超大面积深厚软基的数值分析

张甲峰; 钱建固; 张合青; 韩黎明; 曹 杰; 李军世

塑料排水板联合超载预压处理超大面积深厚软基的数值分析 English Version

张甲峰,钱建固; ,张合青; ,韩黎明; ,曹杰; ,李军世;

基金项目: 国家自然科学基金资助项目（51238009,41272291）

详细信息

作者简介:
张甲峰(1982- )，男，河南濮阳人，博士研究生，工程师，从事岩土工程方面的设计和科研工作。E-mail: jiafeng6060@163.com。

中图分类号: TU472.33
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出版历程
- 收稿日期: 2013-07-18
- 发布日期: 2013-11-24

Numerical analysis of oversized deep soft foundation improved by plastic drainge plates combined with surcharge preloading

1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. China Airport Construction Corporation of CAAC, Beijing 100101, China; 3. Shanghai CAAC New Era Airport Design & Research Institute Co., Ltd., Shanghai 200335, China; 4. The Engineering Research Base of China Airport Construction Corporation of CAAC, Beijing 100101, China

摘要

摘要: 以浦东国际机场软土地基为研究对象,利用二维有限元软件Plaxis,根据土体特性相应采用软土蠕变模型或Mohr-Coulomb模型,针对打设塑料排水板、分层填筑、堆载预压和卸载的实际工况,模拟打设塑料排水板和超载预压的分步实施过程,从数值分析的角度研究了塑料排水板和超载预压处理软土地基的特性,并与实测结果对比分析。结果表明,塑料排水板联合超载预压处理深厚软土地基的沉降分析中考虑软土蠕变是必要的。
- 深厚软基 /
- 蠕变 /
- 超载预压 /
- 塑料排水板 /
- 数值模拟
Abstract: A series of two-dimensional numerical analyses are carried out to investigate the behaviors of soft soil foundation at Shanghai Pudong International Airport by means of the finite element software Plaxis. Both the soft soil model and the Mohr-Coulomb model are used to simulate the staged construction process involving installation of plastic drainage plates, layered filling and surcharge preloading and unloading. The numerical and field monitoring results are compared to investigate the behaviors of soft soil foundation improved by plastic drainage plates together with surcharge loading method. It is shown that it is necessary to take the creep of soft soils into consideration for predicting settlements of thick soft soil layers improved by using this method.
- deep soft foundation /
- creep /
- surcharge preloading /
- plastic drainge plate /
- numerical simulation

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参考文献(5)

[1]	张电吉. 淤泥质黏土的超载预压实验研究[J]. 武汉化工学院院报, 1999, 21(4): 39-42. (ZHANG Dian-ji. Experiment research of surcharge pre-compression on mud[J].Journal of Wuhan Institute of Chemical Technolgy, 1999, 21(4): 39-42. (in Chinese))
[2]	朱向荣, 李振. 舟山国家石油储备基地堆载预压加固效果分析[J]. 岩土力学, 2008, 29(4): 881-886. (ZHU Xiang-rong, LI Zhen. Analysis of consolidation effects of Zhoushan national oil reserve base improved by preloading combined with plastic drains[J]. Rock and Soil Mechanics, 2008, 29(4): 881-886. (in Chinese))
[3]	郭庆海, 周顺华, 王炳龙, 等. 塑料排水板超载预压处理高速公路软基的试验[J]. 同济大学学报（自然科学版）, 2006, 34(3): 340-344. (GUO Qing-hai, ZHOU Shun-hua, WANG Bing-long, et al. Soft ground treated with plastic drainage belt combined with surcharge preloading on express way[J]. Journal of Tongji University (Natural Science), 2006, 34(3): 340-344. (in Chinese))
[4]	叶观宝, 廖星樾, 高彦斌, 等. 长板-短桩工法处理高速公路软土地基的数值分析[J]. 岩土工程学报, 2008, 30(2): 232-236. (YE Guan-bao, LIAO Xing-yue, GAO Yan-bin, et al. Numerical analysis of improved deep soft foundation for highways by use of D-M method[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(2): 232-236. (in Chinese))
[5]	CHAI Jin-chun, SHEN Shui-long. Simple method of modeling PVD-improved subsoil[J]. Journal of Geotechnical and Geoenvironment Engineering, 2001, 127(11): 965-972.